Weierstrass ring

A local Hensel pseudo-geometric ring (cf. Geometric ring; Hensel ring) each quotient ring of which by a prime ideal is a finite extension of a regular local ring (cf. also Regular ring (in commutative algebra)). A Weierstrass ring is analytically irreducible. Any finite extension of a Weierstrass ring is a Weierstrass ring. Examples of Weierstrass rings are analytic rings (rings of convergent power series, cf. Analytic ring) over a perfect field, to which the Weierstrass preparation theorem (cf. Weierstrass theorem) is applicable.

References

[1]	M. Nagata, "Local rings" , Interscience (1962)
[2]	H. Seydi, "Sur la théorie des anneaux de Weierstrass I" Bull. Soc. Math. France , 95 (1971) pp. 227–235